CN105401578A - Down-hole impact base reaming inner anchor head and using method thereof - Google Patents
Down-hole impact base reaming inner anchor head and using method thereof Download PDFInfo
- Publication number
- CN105401578A CN105401578A CN201510870416.3A CN201510870416A CN105401578A CN 105401578 A CN105401578 A CN 105401578A CN 201510870416 A CN201510870416 A CN 201510870416A CN 105401578 A CN105401578 A CN 105401578A
- Authority
- CN
- China
- Prior art keywords
- head
- base
- sliding surface
- hole
- cutter head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
Abstract
The invention discloses a down-hole impact base reaming inner anchor head which comprises a connecting cap, a cutter head and a base which are sequentially arranged from up to down, wherein a disc sliding surface in the cutter head is matched with the side surface of the bottom of a pressure plate on the connecting cap in a sliding manner; a base sliding surface in the cutter head is matched with the side surface of a base head part adopting a frustum structure in a sliding manner; and a nest hole is formed in the base for connecting an anchor rod body. When the down-hole impact base reaming inner anchor head is used, firstly, the base sliding surface, the side surface of the base head part, the disc sliding surface and the side surface of the bottom of the pressure plate are temporarily connected, a down-hole drill wind pressure impactor and a connecting rod are connected, then, a drill pile, the down-hole drill wind pressure impactor and the inner anchor head are put into a straight hole, the impactor directly impacts on the inner anchor head for base reaming, after base reaming, the drill pile, the impactor and the connecting cap are pulled out, then, the anchor rod body is inserted and connected in the nest hole, finally, grouting is carried out, and during base reaming, debris chiseled by the cutter head can be immediately blown away through an air duct. The down-hole impact base reaming inner anchor head is applicable to self base reaming of relatively long anchor rods, the energy transfer efficiency is relatively high, the reaming effect is relatively good, the requirement on the environment is relatively low, residues can be automatically discharged, and the digging efficiency is relatively high.
Description
Technical field
The invention belongs to the technical field of the Engineering anchor rod supportings such as construction work anchor rod foundation anti-floating, side slope and tunnel, particularly relate to a kind of down-the-hole and impact expansion end Inner bolt head and using method thereof, what be specifically applicable to longer anchor pole expands the end certainly, improve energy transfer efficiency, strengthen reaming effect, and lower to environmental requirement.
Background technology
Anchor pole is made up of the body of rod, anchoring section, free segment and anchor head.In order to the anchoring effect of the anchoring section and rock mass that increase rock bolt, by reaming at the bottom of the straight hole of rock, utilize enlarged footing and reaming bottom anchor pole to carry out Inner bolt head at the bottom of the expansion of mechanical snap generation, increase the anchored force of anchoring section, improve cost performance and the reliability of anchor pole.Existing Inner bolt head expands end mode two kinds: a kind of is first use the reaming at the bottom of the straight hole of rock mass of tooling blade bottom expanding drill, then installs the anchor pole formation expansion end Inner bolt head that bottom can expand, is called that mould expands the end; Another kind inserts at the bottom of straight hole by anchor rod body, directly making to be formed in the cutter head embedding hole wall bottom the body of rod to expand end Inner bolt head by impacting pressurization, being called from expanding the end.
Mould expand the end be by the opening of bottom expanding drill tooling blade, rotates, grinding, hole wall forms reaming, and reaming aperture easily ensures, but the mould cutter head of rotary grinding reaming requirement hole wall is smooth, and meanwhile, effect of grinding reaming is lower.
Directly impact pressurization is carried out to the anchor rod body installed from the expansion end, the cutter head bottom the body of rod is made to be directed to hole wall, cutter head smashes hole wall rock and embeds formation expansion end anchoring in hole wall, and reaming effect is higher, but, when from expand end anchor pole anchor into that rock mass is comparatively dark, the body of rod is longer time, body of rod quality is large, and by inertia effects, and the bang path of energy is long, the energy of the external end of impact bar is not easily delivered to the cutter head of bottom, easily causes reaming effect to decline.
Chinese patent, application publication number is CN102192224A, Shen Qing Publication day is the anchoring process that the utility model patent on September 21st, 2011 discloses a kind of crab-bolt and coordinates with it, and the method puts crab-bolt place in preparation to bore a straight hole, re-uses mould bottom expanding drill clear hole after reaming bottom straight hole; The conical head of coupling bottom outlet and sleeve are knocked in bottom outlet by use instrument, and make sleeve along conical head spreading, are formed and are similar to mould expansion end crab-bolt effect, reserve one section of screw rod; Continue in hole, pour into chemical adhesive after, insert the bolt portion of crab-bolt; The internal thread hole of anchoring end is connected with reserved screw rod, waits for colloid solidification, can carry.Although this design have employed a kind of mate bottom outlet conical head and sleeve as Inner bolt head, it is still that a kind of mould expands mode at the bottom of the expansion at the end in essence, and not only effect of grinding reaming is lower, and is subject to expand end environmental limit, and range of application is narrower.
Summary of the invention
The object of the invention is the defect that effect is lower, range of application is narrower and the problem that overcome the grinding reaming existed in prior art, provide a kind of down-the-hole that effect is higher, range of application is wider of grinding reaming to impact and expand end Inner bolt head and using method thereof.
For realizing above object, technical solution of the present invention is: a kind of down-the-hole impacts and expands end Inner bolt head, and comprise base and cutter head, the quantity of described base is one, and the quantity of cutter head is at least two;
Described Inner bolt head also comprises attachment cap, and attachment cap, cutter head, base are from top to bottom arranged successively, described base comprises base head and base afterbody, described base head is up-narrow and down-wide frustum structure, the side of base head is taper seat or the rhombus conical surface, described base afterbody comprises afterbody and lower tail, the bottom surface of base head is connected with lower tail after upper afterbody, base head, the inside of upper afterbody offers the socket bore of same column type, the end face of this socket bore is mutually concordant with the end face of base head, the inwall mantle fiber of socket bore is to connect anchor rod body, upper afterbody is narrower than base head bottom surface, lower tail, upper afterbody and base head, circumferential groove is formed between lower tail,
Described attachment cap comprises connecting rod and platen, and the bottom of this connecting rod is connected with the centre at platen top is vertical, and the bottom of platen is frustum structure wide at the top and narrow at the bottom, and the side bottom platen is taper seat;
Described cutter head comprises interior cutter block and outer hornblock, described interior cutter block is the tetrahedral structure of column type, comprise the inner plane connected as one successively, dish sliding surface, outerplanar, seat sliding surface, described inner plane, outerplanar is parallel to each other, inner plane and dish sliding surface, angle between seat sliding surface is obtuse angle, outerplanar and dish sliding surface, angle between seat sliding surface is acute angle, dish sliding surface is arranged higher than seat sliding surface, dish sliding surface coordinates with the side slip bottom platen, seat sliding surface coordinates with the side slip of base head, on outerplanar, the position of nearly seat sliding surface is connected with the outer hornblock of evagination.
The side of described base head is provided with the geosynclinal block of multiple setting, a chute corresponding with cutter head is formed between adjacent geosynclinal block, chute is consistent with the quantity of cutter head, chute is slidably matched with the cutter head embedded in it, and the seat sliding surface of the bottom surface of chute and the cutter head corresponding to this chute is slidably matched.
The quantity of described cutter head, chute is 2 – 18, and the gradient of the bottom surface of described chute is 1:1 – 10:1.
On described outer hornblock, the position of nearly outerplanar, seat sliding surface junction offers the grooving of an indent, this grooving and outer hornblock are formed with a perpendicular acute angle and a horizontal acute angle, the junction of the perpendicular nearly outerplanar of acute angle, seat sliding surface is arranged, and the distance between horizontal acute angle, outerplanar is the ultimate range between outer hornblock, outerplanar.
In described connecting rod, platen, the position of central axis is run through and is offered same venting cavity, the top of this venting cavity is mutually concordant with the top of connecting rod, the bottom of venting cavity communicates with the top of wireway, be extended down under the tail end of this wireway in socket bore, the tail end of wireway is higher than the bottom of socket bore, the tail end overcoat of wireway has hoop sealing ring to coordinate with the inner wall sealing of socket bore, and the sidewall bottom socket bore offers multiple Horizontal vents be evenly arranged along the radial direction of socket bore.
The quantity of described Horizontal vents is 2 – 8, and described wireway is metal tube or hard plastic tube.
Above-mentioned down-the-hole impacts the using method expanding end Inner bolt head, and described using method comprises the following steps successively:
Assembling Inner bolt head: first the seat sliding surface of cutter head is connected with the side of base head temporarily, again the dish sliding surface of cutter head is connected with the side bottom platen temporarily, with the structure that attachment cap, cutter head, base is assembled into one, thus complete the assembling of Inner bolt head; Described interim connection refers to that bonding adhesive is bonding, adhesive tape twine connect, in galvanized wire binding any one or two or three;
Use Inner bolt head: first in rock or concrete, get out straight hole, again the hidden hole drilling wind pressure impactor on drilling rod is connected with the top of connecting rod, described Inner bolt head to be arranged on the front end of hidden hole drilling wind pressure impactor, then by drilling rod, hidden hole drilling wind pressure impactor, Inner bolt head puts into straight hole in the lump, when putting into, Inner bolt head is positioned at the below of hidden hole drilling wind pressure impactor, when the lower tail in Inner bolt head and straight hole bottom connection touch, stop putting into and opening hidden hole drilling wind pressure impactor, the hidden hole drilling wind pressure impactor started is successively through connecting rod, platen, dish sliding surface impacts cutter head, under the effect of impact force, described interim connection is destroyed, platen moves down, dish sliding surface is along the outwards movement of the side bottom platen, seat sliding surface moves down along the side of base head, outer hornblock is pressed against the hole wall of straight hole to dig it, the broken night dug out falls in circumferential groove, along with constantly carrying out of digging, mechanical snap is formed to generate expansion end anchoring in the hole wall that cutter head embeds straight hole gradually, after expansion end anchoring generates, first extract drilling rod out, hidden hole drilling wind pressure impactor, attachment cap, again threaded for bottom anchor rod body is inserted in socket bore and also rotate to be threaded, then in straight hole, slip casting expands end anchor pole to generate, now, described down-the-hole impacts the using method expanding end Inner bolt head to be terminated.
At the bottom of described expansion anchoring generate refer to: by drilling rod enter stroke to judge expand end anchoring whether generate.
The position of the central axis of described connecting rod, platen is run through and is offered same venting cavity, the top of this venting cavity is mutually concordant with the top of connecting rod, the bottom of venting cavity communicates with the top of wireway, be extended down under the tail end of this wireway in socket bore, the tail end of wireway is higher than the bottom of socket bore, wireway tail end overcoat has hoop sealing ring to coordinate with the inner wall sealing of socket bore, and the sidewall bottom socket bore offers multiple Horizontal vents be evenly arranged along the radial direction of socket bore;
In described use Inner bolt head: when hidden hole drilling wind pressure impactor is connected with the top of connecting rod, the top of venting cavity communicates with the steam vent of hidden hole drilling wind pressure impactor, subsequently, along with constantly carrying out of digging, the pressure-air that hidden hole drilling wind pressure impactor is discharged blows in circumferential groove through venting cavity, wireway, socket bore, Horizontal vents successively, immediately blows away with the chip dug out by cutter head.
Compared with prior art, beneficial effect of the present invention is:
1, a kind of down-the-hole of the present invention impacts and expands in end Inner bolt head and using method thereof, comprise the attachment cap arranged successively from top to bottom, cutter head, base, the dish sliding surface at the side on attachment cap bottom platen and cutter head top is slidably matched, seat sliding surface bottom cutter head coordinates with the side slip of base upper bed-plate head, during use, hidden hole drilling wind pressure impactor is connected with the connecting rod on attachment cap, impactor directly impacts Inner bolt head, cutter head is embedded in straight hole wall and forms expansion end anchoring, shorten energy transferring to the path of cutter head, improve capacity usage ratio, overcome the existing defect that large the caused energy transfer efficiency of expansion long the brought inertia of end anchor rod body is low certainly in bottom-spreading technology, improve reaming effect, be specially adapted to anchor pole at the bottom of longer expansion.Meanwhile, the invention belongs to from expanding the end, requiring lower to straight hole hole wall quality, the range of application expanding the end than mould is wider.In addition, boring of the present invention, expand the end and complete by down-the-hole drill, need not more exchange device, easy construction, can increase work efficiency.Therefore, not only energy transfer efficiency is higher in the present invention, reaming effect is better, and lower to environmental requirement, range of application is wider.
2, a kind of down-the-hole of the present invention impacts and expands in end Inner bolt head and using method thereof, attachment cap, cutter head, base are from top to bottom arranged successively, wherein, impactor is connected to provide power outside attachment cap, cutter head provides cutter wall instrument, and base is responsible for matching so that dig with cutter head on the one hand, is then responsible on the other hand providing circumferential groove with the broken night under splendid attire cutter, disturb to avoid broken night normally carrying out of digging, be convenient to the efficiency improving cutter wall.Therefore, cutting efficiency of the present invention is higher.
3, a kind of down-the-hole of the present invention impacts and expands in end Inner bolt head and using method thereof, at connecting rod, the position of the central axis of platen is run through and is offered same venting cavity, this venting cavity bottom communicates with the top of wireway, be extended down under the tail end of wireway in socket bore, and the radial direction along socket bore on sidewall bottom socket bore offers multiple Horizontal vents be evenly arranged, during use, the top of venting cavity communicates with the steam vent of hidden hole drilling wind pressure impactor, along with constantly carrying out of digging, the pressure-air that impactor is discharged is successively through venting cavity, wireway, socket bore, Horizontal vents blows in circumferential groove, the pressure-air poured in circumferential groove comes and goes and collides upwards to blow out in hole wall, thus the chip dug out by cutter head blows away immediately, greatly reduce the difficulty that cutter head creeps into hole wall, be beneficial to the further driving of cutter head, improve the problem of the not easy-to-discharge slag from the expansion end.In addition, pressure-air can also arrange the chip piled up in circumferential groove, improves the utilization ratio of circumferential groove.Therefore, the chip that cutter head is dug out can blow away by the present invention immediately, achieves the automatic discharge from expanding the end, substantially increases the efficiency that cutter head digs hole wall.
4, a kind of down-the-hole of the present invention impacts and expands in end Inner bolt head and using method thereof, cutter head comprises interior cutter block and outer hornblock, interior cutter block is by inner plane, dish sliding surface, outerplanar, these four faces of seat sliding surface are formed, the inner plane be parallel to each other, outerplanar upper and lower two ends respectively with dish sliding surface, seat sliding surface is connected, outerplanar is then connected with the outer hornblock of evagination, during use, interior cutter block is responsible for the power transmitting impactor, outer hornblock is responsible for directly digging hole wall, interior cutter block passes through platen, dish sliding surface, seat sliding surface, base these two groups is slidably matched to transmit power, can not only on the basis of guaranteeing transmission efficiency, cutter head be avoided to contact with the direct of impactor, protection cutter head, and due to power transmission with dig relatively independent, thus can overcome in prior art and limit the defect that cutter head must possess plastic strain---in the present invention, cutter head slides and opens nature and does not just need plastic strain, Materials with High Strength can be adopted to make, thus improve cutting efficiency, expand application, especially when interior cutter block, when outer hornblock adopts different materials to make, effect is better, the scope of application is wider.Therefore, it is high that cutter head of the present invention not only digs efficiency, and applied range.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is structural representation when being provided with wireway, chute in the present invention.
Fig. 3 is the structural representation of base in Fig. 2.
Fig. 4 is the sectional view of Fig. 3 along A – A direction.
Fig. 5 is the structural representation of attachment cap in Fig. 2.
Fig. 6 is the structural representation of cutter head in Fig. 2.
Fig. 7 is the view that in the present invention, Inner bolt head puts into straight hole.
Fig. 8 is that in the present invention, Inner bolt head has completed the view expanding the end.
Fig. 9 is that the present invention has inserted anchor rod body and view after completing slip casting.
In figure: hidden hole drilling wind pressure impactor 1, base 2, base head 21, base afterbody 22, upper afterbody 221, lower tail 222, socket bore 23, circumferential groove 24, cutter head 3, interior cutter block 31, inner plane 311, dish sliding surface 312, outerplanar 313, seat sliding surface 314, outer hornblock 32, grooving 33, perpendicular acute angle 331, horizontal acute angle 332, attachment cap 4, connecting rod 41, platen 42, venting cavity 43, geosynclinal block 5, chute 51, wireway 6, hoop sealing ring 61, Horizontal vents 62, straight hole 7, drilling rod 8, anchor rod body 9, rock mass or concrete 10.
Detailed description of the invention
Illustrate that the present invention is further detailed explanation with detailed description of the invention below in conjunction with accompanying drawing.
See figure 1 – Fig. 6, a kind of down-the-hole impacts and expands end Inner bolt head, and comprise base 2 and cutter head 3, the quantity of described base 2 is one, and the quantity of cutter head 3 is at least two;
Described Inner bolt head also comprises attachment cap 4, and attachment cap 4, cutter head 3, base 2 are from top to bottom arranged successively, described base 2 comprises base head 21 and base afterbody 22, described base head 21 is up-narrow and down-wide frustum structures, the side of base head 21 is taper seat or the rhombus conical surface, described base afterbody 22 comprises afterbody 221 and lower tail 222, the bottom surface of base head 21 is connected with lower tail 222 after upper afterbody 221, base head 21, the inside of upper afterbody 221 offers the socket bore 23 of same column type, the end face of this socket bore 23 is mutually concordant with the end face of base head 21, the inwall mantle fiber of socket bore 23 is to connect anchor rod body 9, upper afterbody 221 is narrower than base head 21 bottom surface, lower tail 222, upper afterbody 221 and base head 21, circumferential groove 24 is formed between lower tail 222,
Described attachment cap 4 comprises connecting rod 41 and platen 42, and the bottom of this connecting rod 41 is connected with the centre at platen 42 top is vertical, and the bottom of platen 42 is frustum structure wide at the top and narrow at the bottom, and the side bottom platen 42 is taper seat;
Described cutter head 3 comprises interior cutter block 31 and outer hornblock 32, described interior cutter block 31 is the tetrahedral structure of column type, comprise the inner plane 311 connected as one successively, dish sliding surface 312, outerplanar 313, seat sliding surface 314, described inner plane 311, outerplanar 313 is parallel to each other, inner plane 311 and dish sliding surface 312, angle between seat sliding surface 314 is obtuse angle, outerplanar 313 and dish sliding surface 312, angle between seat sliding surface 314 is acute angle, dish sliding surface 312 is arranged higher than seat sliding surface 314, dish sliding surface 312 coordinates with the side slip bottom platen 42, seat sliding surface 314 coordinates with the side slip of base head 21, on outerplanar 313, the position of nearly seat sliding surface 314 is connected with the outer hornblock 32 of evagination.
The side of described base head 21 is provided with the geosynclinal block 5 of multiple setting, a chute 51 corresponding with cutter head 3 is formed between adjacent geosynclinal block 5, chute 51 is consistent with the quantity of cutter head 3, chute 51 is slidably matched with the cutter head 3 embedded in it, and the seat sliding surface 314 of the bottom surface of chute 51 and the cutter head 3 corresponding to this chute 51 is slidably matched.
The quantity of described cutter head 3, chute 51 is 2 – 18, and the gradient of the bottom surface of described chute 51 is 1:1 – 10:1.
On described outer hornblock 32, the position of nearly outerplanar 313, seat sliding surface 314 junction offers the grooving 33 of an indent, this grooving 33 is formed with a perpendicular acute angle 331 and a horizontal acute angle 332 with outer hornblock 32, the junction of the nearly outerplanar 313 of perpendicular acute angle 331, seat sliding surface 314 is arranged, and the distance between horizontal acute angle 332, outerplanar 313 is the ultimate range between outer hornblock 32, outerplanar 313.
In described connecting rod 41, platen 42, the position of central axis is run through and is offered same venting cavity 43, the top of this venting cavity 43 is mutually concordant with the top of connecting rod 41, the bottom of venting cavity 43 communicates with the top of wireway 6, be extended down in socket bore 23 under the tail end of this wireway 6, the tail end of wireway 6 is higher than the bottom of socket bore 23, the tail end overcoat of wireway 6 has hoop sealing ring 61 to coordinate with the inner wall sealing of socket bore 23, and the sidewall bottom socket bore 23 offers multiple Horizontal vents 62 be evenly arranged along the radial direction of socket bore 23.
The quantity of described Horizontal vents 62 is 2 – 8, and described wireway 6 is metal tube or hard plastic tube.
See figure 1 – Fig. 9, a kind of above-mentioned down-the-hole impacts the using method expanding end Inner bolt head, and described using method comprises the following steps successively:
Assembling Inner bolt head: first the seat sliding surface 314 of cutter head 3 is connected with the side of base head 21 temporarily, again the dish sliding surface 312 of cutter head 3 is connected with the side bottom platen 42 temporarily, with the structure that attachment cap 4, cutter head 3, base 2 is assembled into one, thus complete the assembling of Inner bolt head; Described interim connection refers to that bonding adhesive is bonding, adhesive tape twine connect, in galvanized wire binding any one or two or three;
Use Inner bolt head: first in rock or concrete, get out straight hole 7, again the hidden hole drilling wind pressure impactor 1 on drilling rod 8 is connected with the top of connecting rod 41, described Inner bolt head to be arranged on the front end of hidden hole drilling wind pressure impactor 1, then by drilling rod 8, hidden hole drilling wind pressure impactor 1, Inner bolt head puts into straight hole 7 in the lump, when putting into, Inner bolt head is positioned at the below of hidden hole drilling wind pressure impactor 1, when the lower tail 222 in Inner bolt head touches with straight hole 7 bottom connection, stop putting into and opening hidden hole drilling wind pressure impactor 1, the hidden hole drilling wind pressure impactor 1 started is successively through connecting rod 41, platen 42, dish sliding surface 312 pairs of cutter heads 3 impact, under the effect of impact force, described interim connection is destroyed, platen 42 moves down, dish sliding surface 312 is along the outwards movement of the side bottom platen 42, seat sliding surface 314 moves down along the side of base head 21, outer hornblock 32 is pressed against the hole wall of straight hole 7 to dig it, the broken night dug out falls in circumferential groove 24, along with constantly carrying out of digging, mechanical snap is formed to generate expansion end anchoring in the hole wall that cutter head 3 embeds straight hole 7 gradually, after expansion end anchoring generates, first extract drilling rod 8 out, hidden hole drilling wind pressure impactor 1, attachment cap 4, again threaded for bottom anchor rod body 9 is inserted in socket bore 23 and also rotate to be threaded, then in straight hole 7, slip casting expands end anchor pole to generate, now, described down-the-hole impacts the using method expanding end Inner bolt head to be terminated.
At the bottom of described expansion anchoring generate refer to: by drilling rod 8 enter stroke to judge expand end anchoring whether generate.
The position of the central axis of described connecting rod 41, platen 42 is run through and is offered same venting cavity 43, the top of this venting cavity 43 is mutually concordant with the top of connecting rod 41, the bottom of venting cavity 43 communicates with the top of wireway 6, be extended down in socket bore 23 under the tail end of this wireway 6, the tail end of wireway 6 is higher than the bottom of socket bore 23, wireway 6 tail end overcoat has hoop sealing ring 61 to coordinate with the inner wall sealing of socket bore 23, and the sidewall bottom socket bore 23 offers multiple Horizontal vents 62 be evenly arranged along the radial direction of socket bore 23;
In described use Inner bolt head: when hidden hole drilling wind pressure impactor 1 is connected with the top of connecting rod 41, the top of venting cavity 43 communicates with the steam vent of hidden hole drilling wind pressure impactor 1, subsequently, along with constantly carrying out of digging, the pressure-air that hidden hole drilling wind pressure impactor 1 is discharged blows in circumferential groove 24 through venting cavity 43, wireway 6, socket bore 23, Horizontal vents 62 successively, immediately blows away with the chip dug out by cutter head 3.
Principle of the present invention is described as follows:
Existing rock or concrete under-reamed anchor pole are divided into two kinds by reaming mode: one is that mould expands the end, rotated by the bottom expanding drill of mould cutter head, cutter head opens, rotate and the grinding of petrosal foramen wall to carry out reaming, the mould cutter head of rotary grinding reaming requires that hole wall is smooth, meanwhile, effect of grinding reaming is lower; Another kind is from expanding the end, directly carries out impact pressurization to the anchor rod body installed, makes the cutter head bottom the body of rod be directed to hole wall, and cutter head smashes in hole wall rock embedding hole wall to be formed and expands end anchoring, and reaming effect is higher.Although expand the end from the effect expanding the end higher than mould, but when anchor rod body is long, body of rod quality is large, by inertia effects, simultaneously, the distance that impact energy is transmitted is long, capital causes the energy of the external end of impact bar to be not easily delivered to the cutter head of bottom, thus cause the effect expanding the end to decline, such as: the reinforced anchor bolt length that the reinforced anchor bolt length of diameter 32mm reaches 6m or diameter 25mm reaches 10m, from the outer end hammering reaming of expanding end anchor pole, by the impact of body of rod inertia, and the distance that the shock wave of hammering generation transmits is long, causes impact energy transmission efficiency low.In order to solve this problem, the present invention proposes anchor rod body and Inner bolt head to separate, and is arranged on by Inner bolt head on hidden hole drilling wind pressure impactor, directly impacts pressurization by impactor to Inner bolt head, the advantage from expanding the end can being retained, long the brought defect of anchor rod body can be overcome again.
Attachment cap in this Inner bolt head, cutter head, base is from top to bottom arranged successively, cutter head comprises interior cutter block and outer hornblock, interior cutter block is responsible for the power transmitting impactor, outer hornblock is responsible for directly digging hole wall, during use, impactor directly provides impact force by the platen on attachment cap to cutter head, under the effect of impact force, cutter head achieves two groups of relative slidings, i.e. " platen, dish sliding surface relative sliding " and " seat sliding surface, base relative sliding ", the impact force that impactor provides can not only be delivered on outer hornblock constantly to dig hole wall by these two groups of relative slidings, and multiple cutter head can be made naturally to scatter along the side of base head, do not need plastic strain, outer hornblock is finally embedded in hole wall realize expanding the end.
Attachment cap: require enough intensity, can pass to the impact force of impactor the cutter head be close at the bottom of platen, and can reuse, therefore attachment cap is metal device, can adopt round steel bar Vehicle Processing manufacture.
Cutter head: adopting Materials with High Strength, as selected cast steel casting, comprising interconnective interior cutter block and outer hornblock.Interior cutter block is the tetrahedral structure of column type, and its cross section is rectangle, trapezoidal or polygon, and outer hornblock is processed into tip-angled shape, is convenient to cut a hole pure rock.After assembling, before cutting, multiple cutter head gathers together, along with constantly carrying out of digging, platen, dish sliding surface relative sliding, seat sliding surface, base relative sliding, the distance that attachment cap the moves down displacement outside to cutter head is relevant, dish sliding surface can be horizontal plane, also can be tapered plane, according to the moving direction of cutter head, the hammer effect of tapered plane be better.Expand in the whole process at the end, except hornblock and hole wall have outside incision, other position can not hinder the movement of cutter head.
Base: be metal device, considers complex-shaped, and working stress is large, selects cast steel casting.Meanwhile, base head is defined as the object of up-narrow and down-wide frustum structure is to make the cutter head be attached thereto be subject to not deflect during the impact of attachment cap.
Hoop sealing ring: the external diameter of sealing ring is determined by the internal diameter of socket bore, so that confined bed tracheae inserts the gap formed in socket bore between the two.
Embodiment 1:
See figure 1 – Fig. 6, a kind of down-the-hole impacts and expands end Inner bolt head, and comprise base 2, cutter head 3 and attachment cap 4, the quantity of described base 2, attachment cap 4 is one, and the quantity of cutter head 3 is at least two, and attachment cap 4, cutter head 3, base 2 are from top to bottom arranged successively;
Described base 2 comprises base head 21 and base afterbody 22, described base head 21 is up-narrow and down-wide frustum structures, the side of base head 21 is taper seat or the rhombus conical surface, described base afterbody 22 comprises afterbody 221 and lower tail 222, the bottom surface of base head 21 is connected with lower tail 222 after upper afterbody 221, base head 21, the inside of upper afterbody 221 offers the socket bore 23 of same column type, the end face of this socket bore 23 is mutually concordant with the end face of base head 21, the inwall mantle fiber of socket bore 23 is to connect anchor rod body 9, upper afterbody 221 is narrower than base head 21 bottom surface, lower tail 222, upper afterbody 221 and base head 21, circumferential groove 24 is formed between lower tail 222, described attachment cap 4 comprises connecting rod 41 and platen 42, and the bottom of this connecting rod 41 is connected with the centre at platen 42 top is vertical, and the bottom of platen 42 is frustum structure wide at the top and narrow at the bottom, and the side bottom platen 42 is taper seat, described cutter head 3 comprises interior cutter block 31 and outer hornblock 32, described interior cutter block 31 is the tetrahedral structure of column type, comprise the inner plane 311 connected as one successively, dish sliding surface 312, outerplanar 313, seat sliding surface 314, described inner plane 311, outerplanar 313 is parallel to each other, inner plane 311 and dish sliding surface 312, angle between seat sliding surface 314 is obtuse angle, outerplanar 313 and dish sliding surface 312, angle between seat sliding surface 314 is acute angle, dish sliding surface 312 is arranged higher than seat sliding surface 314, dish sliding surface 312 coordinates with the side slip bottom platen 42, seat sliding surface 314 coordinates with the side slip of base head 21, on outerplanar 313, the position of nearly seat sliding surface 314 is connected with the outer hornblock 32 of evagination.
See figure 1 – Fig. 9, a kind of above-mentioned down-the-hole impacts the using method expanding end Inner bolt head, and described using method comprises the following steps successively:
Assembling Inner bolt head: first the seat sliding surface 314 of cutter head 3 is connected with the side of base head 21 temporarily, again the dish sliding surface 312 of cutter head 3 is connected with the side bottom platen 42 temporarily, with the structure that attachment cap 4, cutter head 3, base 2 is assembled into one, thus complete the assembling of Inner bolt head; Described interim connection refers to that bonding adhesive is bonding, adhesive tape twine connect, in galvanized wire binding any one or two or three;
Use Inner bolt head: first in rock or concrete, get out straight hole 7, again the hidden hole drilling wind pressure impactor 1 on drilling rod 8 is connected with the top of connecting rod 41, described Inner bolt head to be arranged on the front end of hidden hole drilling wind pressure impactor 1, then by drilling rod 8, hidden hole drilling wind pressure impactor 1, Inner bolt head puts into straight hole 7 in the lump, when putting into, Inner bolt head is positioned at the below of hidden hole drilling wind pressure impactor 1, when the lower tail 222 in Inner bolt head touches with straight hole 7 bottom connection, stop putting into and opening hidden hole drilling wind pressure impactor 1, the hidden hole drilling wind pressure impactor 1 started is successively through connecting rod 41, platen 42, dish sliding surface 312 pairs of cutter heads 3 impact, under the effect of impact force, described interim connection is destroyed, platen 42 moves down, dish sliding surface 312 is along the outwards movement of the side bottom platen 42, seat sliding surface 314 moves down along the side of base head 21, outer hornblock 32 is pressed against the hole wall of straight hole 7 to dig it, the broken night dug out falls in circumferential groove 24, along with constantly carrying out of digging, mechanical snap is formed to generate expansion end anchoring in the hole wall that cutter head 3 embeds straight hole 7 gradually, when expand end anchoring generate after (entering stroke to judge expansion end anchoring and whether generate by drilling rod 8), first extract drilling rod 8 out, hidden hole drilling wind pressure impactor 1, attachment cap 4, again threaded for bottom anchor rod body 9 is inserted in socket bore 23 also to rotate and (be threaded to carry out being threaded and can adopt high-strength fining twisted steel, be convenient to the steel using amount reducing anchor rod body 9), then in straight hole 7, slip casting expands end anchor pole to generate, now, described down-the-hole impacts the using method expanding end Inner bolt head to be terminated.
Embodiment 2:
Substance is with embodiment 1, and difference is:
The side of described base head 21 is provided with the geosynclinal block 5 of multiple setting, a chute 51 corresponding with cutter head 3 is formed between adjacent geosynclinal block 5, chute 51 is consistent with the quantity of cutter head 3, chute 51 is slidably matched with the cutter head 3 embedded in it, and the seat sliding surface 314 of the bottom surface of chute 51 and the cutter head 3 corresponding to this chute 51 is slidably matched; The quantity of described cutter head 3, chute 51 is 2 – 18, and the gradient of the bottom surface of described chute 51 is 1:1 – 10:1.The side that the bottom surface of described chute 51 refers to base head 21 is positioned at the position of chute 51.Chute 51 in use, can better locate the orientation of cutter head 3, the rollover of cutter head 3 when preventing attachment cap 4 from being impacted.Meanwhile, geosynclinal block 5 can not be established oversize, in order to avoid contact with attachment cap 4 in installation process, affects attachment cap 4 hammering cutter head.
Embodiment 3:
Substance is with embodiment 1, and difference is:
On described outer hornblock 32, the position of nearly outerplanar 313, seat sliding surface 314 junction offers the grooving 33 of an indent, this grooving 33 is formed with a perpendicular acute angle 331 and a horizontal acute angle 332 with outer hornblock 32, the junction of the nearly outerplanar 313 of perpendicular acute angle 331, seat sliding surface 314 is arranged, and the distance between horizontal acute angle 332, outerplanar 313 is the ultimate range between outer hornblock 32, outerplanar 313.
Embodiment 4:
Substance is with embodiment 1, and difference is:
Structurally: described connecting rod 41, the position of the central axis of platen 42 is run through and is offered same venting cavity 43, the top of this venting cavity 43 is mutually concordant with the top of connecting rod 41, the bottom of venting cavity 43 is mutually concordant with the bottom surface of platen 42, and the bottom of venting cavity 43 communicates with the top of wireway 6, be extended down in socket bore 23 under the tail end of this wireway 6, the tail end of wireway 6 is higher than the bottom of socket bore 23, the tail end overcoat of wireway 6 has hoop sealing ring 61 to coordinate with the inner wall sealing of socket bore 23, sidewall bottom socket bore 23 offers multiple Horizontal vents 62 be evenly arranged along the radial direction of socket bore 23,
It is in operation: when hidden hole drilling wind pressure impactor 1 is connected with the top of connecting rod 41, the top of venting cavity 43 communicates with the steam vent of hidden hole drilling wind pressure impactor 1, subsequently, along with constantly carrying out of digging, the pressure-air that hidden hole drilling wind pressure impactor 1 is discharged blows in circumferential groove 24 through venting cavity 43, wireway 6, socket bore 23, Horizontal vents 62 successively, pressure-air comes and goes and collides upwards to run in straight hole 7, thus the chip that cutter head 3 is dug out is blown away immediately, be convenient to carrying out smoothly of cutter head 3 cutting.
Claims (9)
1. down-the-hole impacts and expands an end Inner bolt head, and comprise base (2) and cutter head (3), the quantity of described base (2) is one, and the quantity of cutter head (3) is at least two, it is characterized in that:
Described Inner bolt head also comprises attachment cap (4), and attachment cap (4), cutter head (3), base (2) are from top to bottom arranged successively, described base (2) comprises base head (21) and base afterbody (22), described base head (21) is up-narrow and down-wide frustum structure, the side of base head (21) is taper seat or the rhombus conical surface, described base afterbody (22) comprises afterbody (221) and lower tail (222), the bottom surface of base head (21) is connected with lower tail (222) after upper afterbody (221), base head (21), the inside of upper afterbody (221) offers the socket bore (23) of same column type, the end face of this socket bore (23) is mutually concordant with the end face of base head (21), the inwall mantle fiber of socket bore (23) is to connect anchor rod body (9), upper afterbody (221) is narrower than base head (21) bottom surface, lower tail (222), upper afterbody (221) and base head (21), circumferential groove (24) is formed between lower tail (222),
Described attachment cap (4) comprises connecting rod (41) and platen (42), the bottom of this connecting rod (41) is connected with the centre at platen (42) top is vertical, the bottom of platen (42) is frustum structure wide at the top and narrow at the bottom, and the side of platen (42) bottom is taper seat;
Described cutter head (3) comprises interior cutter block (31) and outer hornblock (32), the tetrahedral structure that described interior cutter block (31) is column type, comprise the inner plane (311) connected as one successively, dish sliding surface (312), outerplanar (313), seat sliding surface (314), described inner plane (311), outerplanar (313) is parallel to each other, inner plane (311) and dish sliding surface (312), angle between seat sliding surface (314) is obtuse angle, outerplanar (313) and dish sliding surface (312), angle between seat sliding surface (314) is acute angle, dish sliding surface (312) is arranged higher than seat sliding surface (314), dish sliding surface (312) coordinates with the side slip of platen (42) bottom, seat sliding surface (314) coordinates with the side slip of base head (21), the position of the upper nearly seat sliding surface (314) of outerplanar (313) is connected with the outer hornblock (32) of evagination.
2. a kind of down-the-hole according to claim 1 impacts and expands end Inner bolt head, it is characterized in that: the geosynclinal block (5) side of described base head (21) being provided with multiple setting, a chute (51) corresponding with cutter head (3) is formed between adjacent geosynclinal block (5), chute (51) is consistent with the quantity of cutter head (3), chute (51) is slidably matched with the cutter head (3) embedded in it, and the seat sliding surface (314) of the bottom surface of chute (51) and the cutter head (3) corresponding to this chute (51) is slidably matched.
3. a kind of down-the-hole according to claim 2 impacts and expands end Inner bolt head, and it is characterized in that: the quantity of described cutter head (3), chute (51) is 2 – 18, the gradient of the bottom surface of described chute (51) is 1:1 – 10:1.
4. according to claim 1, a kind of down-the-hole described in 2 or 3 impacts and expands end Inner bolt head, it is characterized in that: the upper nearly outerplanar (313) of described outer hornblock (32), the position of seat sliding surface (314) junction offers the grooving (33) of an indent, this grooving (33) and outer hornblock (32) are formed with a perpendicular acute angle (331) and a horizontal acute angle (332), the nearly outerplanar (313) of perpendicular acute angle (331), the junction of seat sliding surface (314) is arranged, horizontal acute angle (332), distance between outerplanar (313) is outer hornblock (32), ultimate range between outerplanar (313).
5. according to claim 1, a kind of down-the-hole described in 2 or 3 impacts and expands end Inner bolt head, it is characterized in that: described connecting rod (41), the position of platen (42) interior central axis is run through and is offered same venting cavity (43), the top of this venting cavity (43) is mutually concordant with the top of connecting rod (41), the bottom of venting cavity (43) communicates with the top of wireway (6), be extended down in socket bore (23) under the tail end of this wireway (6), the tail end of wireway (6) is higher than the bottom of socket bore (23), the tail end overcoat of wireway (6) has hoop sealing ring (61) to coordinate with the inner wall sealing of socket bore (23), radial direction along socket bore (23) on the sidewall of socket bore (23) bottom offers multiple Horizontal vents (62) be evenly arranged.
6. a kind of down-the-hole according to claim 5 impacts and expands end Inner bolt head, it is characterized in that: the quantity of described Horizontal vents (62) is 2 – 8, and described wireway (6) is metal tube or hard plastic tube.
7. the down-the-hole described in claim 1,2 or 3 impacts the using method expanding end Inner bolt head, it is characterized in that described using method comprises the following steps successively:
Assembling Inner bolt head: first the seat sliding surface (314) of cutter head (3) is connected with the side of base head (21) temporarily, again the side of the dish sliding surface (312) of cutter head (3) with platen (42) bottom is connected temporarily, with the structure that attachment cap (4), cutter head (3), base (2) is assembled into one, thus complete the assembling of Inner bolt head; Described interim connection refers to that bonding adhesive is bonding, adhesive tape twine connect, in galvanized wire binding any one or two or three;
Use Inner bolt head: first in rock or concrete, get out straight hole (7), again the hidden hole drilling wind pressure impactor (1) on drilling rod (8) is connected with the top of connecting rod (41), described Inner bolt head to be arranged on the front end of hidden hole drilling wind pressure impactor (1), then by drilling rod (8), hidden hole drilling wind pressure impactor (1), Inner bolt head puts into straight hole (7) in the lump, when putting into, Inner bolt head is positioned at the below of hidden hole drilling wind pressure impactor (1), when the lower tail (222) in Inner bolt head touches with straight hole (7) bottom connection, stop putting into and opening hidden hole drilling wind pressure impactor (1), the hidden hole drilling wind pressure impactor (1) started is successively through connecting rod (41), platen (42), dish sliding surface (312) impacts cutter head (3), under the effect of impact force, described interim connection is destroyed, platen (42) moves down, dish sliding surface (312) is along the side outwards movement of platen (42) bottom, seat sliding surface (314) moves down along the side of base head (21), outer hornblock (32) is pressed against the hole wall of straight hole (7) to dig it, the broken night dug out falls in circumferential groove (24), along with constantly carrying out of digging, mechanical snap is formed to generate expansion end anchoring in the hole wall that cutter head (3) embeds straight hole (7) gradually, after expansion end anchoring generates, first extract drilling rod (8) out, hidden hole drilling wind pressure impactor (1), attachment cap (4), again threaded for bottom anchor rod body (9) is inserted in socket bore (23) and also rotate to be threaded, then in straight hole (7), slip casting expands end anchor pole to generate, now, described down-the-hole impacts the using method expanding end Inner bolt head to be terminated.
8. a kind of down-the-hole according to claim 7 impacts the using method expanding end Inner bolt head, it is characterized in that: anchoring at the bottom of described expansion generates and refers to: entering stroke to judge and expand end anchoring and whether generate by drilling rod (8).
9. a kind of down-the-hole according to claim 7 impacts the using method expanding end Inner bolt head, it is characterized in that:
Described connecting rod (41), the position of the central axis of platen (42) is run through and is offered same venting cavity (43), the top of this venting cavity (43) is mutually concordant with the top of connecting rod (41), the bottom of venting cavity (43) communicates with the top of wireway (6), be extended down in socket bore (23) under the tail end of this wireway (6), the tail end of wireway (6) is higher than the bottom of socket bore (23), wireway (6) tail end overcoat has hoop sealing ring (61) to coordinate with the inner wall sealing of socket bore (23), radial direction along socket bore (23) on the sidewall of socket bore (23) bottom offers multiple Horizontal vents (62) be evenly arranged,
In described use Inner bolt head: when hidden hole drilling wind pressure impactor (1) is connected with the top of connecting rod (41), the top of venting cavity (43) communicates with the steam vent of hidden hole drilling wind pressure impactor (1), subsequently, along with constantly carrying out of digging, the pressure-air that hidden hole drilling wind pressure impactor (1) is discharged blows in circumferential groove (24) through venting cavity (43), wireway (6), socket bore (23), Horizontal vents (62) successively, immediately blows away with the chip dug out by cutter head (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510870416.3A CN105401578B (en) | 2015-12-01 | 2015-12-01 | A kind of down-the-hole impact base expanding and base expanding Inner bolt head and its using method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510870416.3A CN105401578B (en) | 2015-12-01 | 2015-12-01 | A kind of down-the-hole impact base expanding and base expanding Inner bolt head and its using method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105401578A true CN105401578A (en) | 2016-03-16 |
| CN105401578B CN105401578B (en) | 2017-03-29 |
Family
ID=55467309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510870416.3A Active CN105401578B (en) | 2015-12-01 | 2015-12-01 | A kind of down-the-hole impact base expanding and base expanding Inner bolt head and its using method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105401578B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0650316A (en) * | 1992-06-19 | 1994-02-22 | Artur Fischer Gmbh | Expanding anchor |
| JPH07286326A (en) * | 1994-04-15 | 1995-10-31 | Katsumura Kensetsu Kk | Application method of ground anchor |
| CN101509253A (en) * | 2009-03-17 | 2009-08-19 | 武汉武大巨成加固实业有限公司 | Block-wedge-type self-locking inner anchor head |
| CN101691843A (en) * | 2009-09-18 | 2010-04-07 | 武汉武大巨成加固实业有限公司 | Rear chambering self-locking anchor rod capable of being quickly assembled |
| CN104563109A (en) * | 2015-01-29 | 2015-04-29 | 武汉武大巨成结构股份有限公司 | Improved sleeve type inner anchor head |
| CN205171512U (en) * | 2015-12-01 | 2016-04-20 | 武大巨成结构股份有限公司 | Down --hole strikes and expands anchor head at end |
-
2015
- 2015-12-01 CN CN201510870416.3A patent/CN105401578B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0650316A (en) * | 1992-06-19 | 1994-02-22 | Artur Fischer Gmbh | Expanding anchor |
| JPH07286326A (en) * | 1994-04-15 | 1995-10-31 | Katsumura Kensetsu Kk | Application method of ground anchor |
| CN101509253A (en) * | 2009-03-17 | 2009-08-19 | 武汉武大巨成加固实业有限公司 | Block-wedge-type self-locking inner anchor head |
| CN101691843A (en) * | 2009-09-18 | 2010-04-07 | 武汉武大巨成加固实业有限公司 | Rear chambering self-locking anchor rod capable of being quickly assembled |
| CN104563109A (en) * | 2015-01-29 | 2015-04-29 | 武汉武大巨成结构股份有限公司 | Improved sleeve type inner anchor head |
| CN205171512U (en) * | 2015-12-01 | 2016-04-20 | 武大巨成结构股份有限公司 | Down --hole strikes and expands anchor head at end |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105401578B (en) | 2017-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11299864B2 (en) | Jetting, expansion and extrusion combined pile, construction method thereof and spiral jetting, expansion and extrusion drilling rig used in method | |
| CN100408759C (en) | Longitudinally inserted horizontally wedged construction pile and its construction method | |
| CN205171512U (en) | Down --hole strikes and expands anchor head at end | |
| CN102061699B (en) | Reinforcing bar of bottom-reamed bored pile and construction method thereof | |
| US11505908B2 (en) | Drilling apparatus and PHC pipe cased pile, and method of drilling with PHC pipe cased pile | |
| CN105672311B (en) | The construction method of anchor pole | |
| CN205822182U (en) | A kind of hollow is from base expanding and base expanding crab-bolt | |
| CN205576908U (en) | Novel anchoring rod | |
| CN105401578A (en) | Down-hole impact base reaming inner anchor head and using method thereof | |
| CN212129131U (en) | Crowded native pore-forming stock construction structures | |
| CN105951825B (en) | It is a kind of hollow from base expanding and base expanding crab-bolt and its installation method | |
| CN201090135Y (en) | Combined drilling tool | |
| CN202300201U (en) | Combined drill bit | |
| CN102628268A (en) | Cyclone pile | |
| CN211735346U (en) | Punching and expanding device for compacting and reinforcing soft soil | |
| CN113323660B (en) | High-stress high-hydraulic coal breaking and reaming device | |
| CN211008459U (en) | High-efficient down-the-hole hammer drill bit | |
| CN208288086U (en) | A kind of heavy type quartering hammer | |
| CN210714476U (en) | Down-the-hole hammer drill bit | |
| CN201292761Y (en) | High wind pressure downhole air hammer | |
| CN201546639U (en) | Anti-scour special drill rod | |
| CN112523688A (en) | Efficient and environment-friendly long spiral rock-socketed pile machine | |
| US5884978A (en) | Hammer tool for boom mountable power hammer | |
| CN216767269U (en) | Novel crawler-type percussion drill hammer head | |
| CN215057090U (en) | Large-scale hydraulic deep hole crushing drill bit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 4, Wuda Science and Technology Park Road, Donghu Development Zone, Wuhan City, Hubei Province, 430223 Patentee after: Wuhan Jucheng Structure Group Co.,Ltd. Address before: No. 4, Wuda Science and Technology Park Road, Donghu Development Zone, Wuhan City, Hubei Province, 430223 Patentee before: WUDA JUCHENG STRUCTURE Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |